Perennials, 40–70+ cm, fibrous-rooted and/or rhizomatous (rhizomes weakly branched). Stems 1, glabrous or leaf axils sparsely tomentose. Basal leaves (and proximal cauline) petiolate; blades narrowly ovate to oblong-lanceolate, 30–70+ × 10–20+ mm, bases abruptly contracted to subcordate, margins usually serrate-dentate, sometimes subcrenate (apices acute). Cauline leaves gradually reduced (± sessile; lacerate to subcrenate). Heads 8–20+ in loose, corymbiform arrays. Peduncles bracteate, glabrous. Calyculi conspicuous. Phyllaries 13 or 21, light green (tips sometimes black), 5–8 mm, glabrous. Ray florets 8–13; corolla laminae 4–7 mm. Disc florets 50–70+; corolla tubes 3.5–4 mm, limbs 3–3.5 mm. Cypselae 1–1.5 mm, glabrous; pappi 5–5.5 mm. 2n = 44.
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